Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2011 Cadillac Escalade EXTFACTORY OEM SERVICE PROCEDURE
Circuit/System Testing
- Ignition OFF, test for less than 1.0 Ξ© between the drive motor generator power inverter module case and ground strap.
- If greater than the specified value, test the ground circuit for an open/high resistance.
- Ignition OFF, disconnect the harness connector X1 of the drive motor generator power inverter module.
- Ignition ON, verify that a test lamp illuminates between each of the following B+ circuit terminals and ground.
- Terminal 6 X1
- Terminal 7 X1
- If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit fuse is open, test the control circuits of the drive motor generator power inverter module for a short to ground. If the circuits test normal, replace the drive motor generator power inverter module.
- Ignition ON, verify that a test lamp illuminates between each ignition circuit terminal 20 X1 and ground.
- If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit fuse is open, test the control circuits of the drive motor generator power inverter module for a short to ground. If the circuits test normal, replace the drive motor generator power inverter module.
- Ignition ON, verify that a test lamp illuminates between the wakeup circuit terminal 19 X1 and ground.
- If the test lamp does not illuminate, test the entire circuit for an open/high resistance or short to ground. If the circuits test normal, replace the serial data gateway (SDG) module.
- Ignition OFF, disconnect the harness connector X1 of the accessory DC power control module.
- Test for less than 2 Ξ© between the following powertrain serial data circuit terminals.
- Accessory DC power control module terminal 2 X1 and drive motor generator power inverter module terminal 25 X1
- Accessory DC power control module terminal 1 X1 and drive motor generator power inverter module terminal 24 X1
- If greater than the specified range, test the circuit for an open/high resistance.
- Ignition OFF, disconnect the harness connector X3 of the engine control module (ECM).
- Test for less than 2 Ξ© between the following powertrain serial data circuit terminals.
- Drive motor generator power inverter module terminal 11 X1 and ECM terminal 53 X3
- Drive motor generator power inverter module terminal 10 X1 and ECM terminal 33 X3
- If greater than the specified range, test the circuit for an open/high resistance.
- If all circuits test normal, replace the drive motor generator power inverter module.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.